Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Patent
1987-08-14
1989-07-04
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
360 66, G11B 509
Patent
active
048455733
ABSTRACT:
In an arrangement for recording data or a magnetic recording medium, the inputs of an amplifier whose outputs are connected to a magnetic head are preceded by filters which delay magnetic bias signals and data signals supplied to the amplifier and limit their steepness. Undesirably high voltages at the magnetic head as a consequence of excessively steep edges of a write current supplied to the magnetic head are thus avoided, and the reliability of the recording of the data on the magnetic recording medium is increased.
REFERENCES:
patent: 3381098 (1968-04-01), Pezirtzoglou
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patent: 3665485 (1972-05-01), Pear, Jr.
patent: 3821797 (1974-06-01), Suzuki et al.
patent: 4202017 (1980-05-01), Geffon et al.
patent: 4383281 (1983-05-01), Lesieur
patent: 4547818 (1985-10-01), Lia
IBM Technical Disclosure Bulletin, vol. 15, No. 3, Aug. 1972, J. D. Armitage, Jr. et al, "Magnetic Recording and Feedback Systems".
IBM Technical Disclosure Bulletin, vol. 23, No. 9, Feb. 1981, K. B. Klaassen, "AC Bias Read-While-Write Driver".
Japan--Patent No. 57-3207(A), vol. 6, No. 62 (P-111) (940), Apr. 21, 1982.
Canney Vincent P.
Fournier Kevin J.
Tandberg Data A/S
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